<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>计算器</title>
</head>
<body>
<div>
  <input type="text" v-model="n1">
  <input type="text" v-model="n2">
  <input type="button" value="加" @click="f('+')">
  <input type="button" value="减" @click="f('-')">
  <input type="button" value="乘" @click="f('*')">
  <input type="button" value="除" @click="f('/')">
  <h3>结果：{{result}}</h3>
</div>
<script src="../../js/vue.min.js"></script>
<script>
  let v = new Vue({
    el:"body>div",
    data:{
      result:"0",n1:"",n2:""
    },
      methods:{
        f(x){
            //eval()此方法可以将字符串以代码的方式执行
            v.result = eval(v.n1 + x + v.n2);
        }
      }
  })
</script>

</body>
</html>